Abstract
The binding property of thirteen 12-diazacrown-4 derivatives for alkali metal ions was examined, and from these results we selected the heptyl group as the most suitable substituent for the monomer. Then the radical polymerization of Nacryloyl-N'-heptyl-12-diazacrown-4 and the subsequent reduction of the produced polymer by diborane-THF were carried out. The reduced polymer retained the high binding ability for the lithium ion, but the selectivity was unexpectedly low.